package com.ruoyi.web.controller.common;

import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.URLEncoder;
import java.util.ArrayList;
import java.util.List;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import com.alibaba.fastjson2.JSONObject;
import com.ruoyi.common.core.domain.R;
import com.ruoyi.common.utils.file.FileUploadUtils;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.http.HttpHeaders;
import java.nio.file.Files;
import org.springframework.http.MediaType;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.multipart.MultipartFile;
import com.ruoyi.common.config.RuoYiConfig;
import com.ruoyi.common.constant.Constants;
import com.ruoyi.common.core.domain.AjaxResult;
import com.ruoyi.common.utils.StringUtils;
import com.ruoyi.common.utils.file.FileUtils;
import com.ruoyi.framework.config.ServerConfig;
import org.springframework.web.servlet.mvc.method.annotation.StreamingResponseBody;

/**
 * 通用请求处理
 *
 * @author ruoyi
 */
@RestController
@RequestMapping("/common")
@Api(tags = "通用请求")
public class CommonController {
    private static final Logger log = LoggerFactory.getLogger(CommonController.class);

    @Autowired
    private ServerConfig serverConfig;

    private static final String FILE_DELIMETER = ",";
    
    @Value("${nginx.ip}")
    private String nginxIp;
    
    @Value("${nginx.port}")
    private String nginxPort;

    /**
     * 通用下载请求
     *
     * @param fileName 文件名称
     * @param delete   是否删除
     */
    @GetMapping("/download/{fileName}")
    @ApiOperation("通用下载请求")
    public void fileDownload(@PathVariable("fileName") String fileName, Boolean delete, HttpServletResponse response, HttpServletRequest request) {
        try {
            if (!FileUtils.checkAllowDownload(fileName)) {
                throw new Exception(StringUtils.format("文件名称({})非法，不允许下载。 ", fileName));
            }
            String realFileName = System.currentTimeMillis() + fileName.substring(fileName.indexOf("_") + 1);
            String filePath = RuoYiConfig.getDownloadPath() + fileName;
            response.setContentType(MediaType.APPLICATION_OCTET_STREAM_VALUE);
            FileUtils.setAttachmentResponseHeader(response, realFileName);
            FileUtils.writeBytes(filePath, response.getOutputStream());
            delete = true;
            if (delete) {
                FileUtils.deleteFile(filePath);
            }
        } catch (Exception e) {
            log.error("下载文件失败", e);
        }
    }

    @GetMapping("/getFileDownloadUrl/{fileName}")
    @ApiOperation("通用下载请求获取下载地址")
    public R<String> getFileDownloadUrl(@PathVariable("fileName") String fileName) {
        http://43.137.62.10/download/
        return R.ok("http://"+nginxIp+":"+nginxPort+"/download/"+fileName);
    }

    /**
     * 通用上传请求（单个）
     */
    @PostMapping("/upload")
    @ApiOperation("通用上传请求")
    public R uploadFile(@RequestPart(value = "file") MultipartFile file) throws Exception {
        try {
            // 上传文件路径
            String filePath = RuoYiConfig.getUploadPath();
            // 上传并返回新文件名称
            String fileName = FileUploadUtils.upload(filePath, file);
            String url = serverConfig.getUrl() + fileName;
            JSONObject jsonObject = new JSONObject();
            jsonObject.put("url", url);
            jsonObject.put("fileName", fileName);
            jsonObject.put("newFileName", FileUtils.getName(fileName));
            jsonObject.put("originalFilename", file.getOriginalFilename());
            return R.ok(jsonObject);
        } catch (Exception e) {
            return R.fail(e.getMessage());
        }
    }

    /**
     * 通用上传请求（多个）
     */
    @PostMapping("/uploads")
    public AjaxResult uploadFiles(List<MultipartFile> files) throws Exception {
        try {
            // 上传文件路径
            String filePath = RuoYiConfig.getUploadPath();
            List<String> urls = new ArrayList<String>();
            List<String> fileNames = new ArrayList<String>();
            List<String> newFileNames = new ArrayList<String>();
            List<String> originalFilenames = new ArrayList<String>();
            for (MultipartFile file : files) {
                // 上传并返回新文件名称
                String fileName = FileUploadUtils.upload(filePath, file);
                String url = serverConfig.getUrl() + fileName;
                urls.add(url);
                fileNames.add(fileName);
                newFileNames.add(FileUtils.getName(fileName));
                originalFilenames.add(file.getOriginalFilename());
            }
            AjaxResult ajax = AjaxResult.success();
            ajax.put("urls", StringUtils.join(urls, FILE_DELIMETER));
            ajax.put("fileNames", StringUtils.join(fileNames, FILE_DELIMETER));
            ajax.put("newFileNames", StringUtils.join(newFileNames, FILE_DELIMETER));
            ajax.put("originalFilenames", StringUtils.join(originalFilenames, FILE_DELIMETER));
            return ajax;
        } catch (Exception e) {
            return AjaxResult.error(e.getMessage());
        }
    }

    /**
     * 本地资源通用下载
     */
    @GetMapping("/download/resource")
    public void resourceDownload(String resource, HttpServletRequest request, HttpServletResponse response)
            throws Exception {
//        try {
//            if (!FileUtils.checkAllowDownload(resource)) {
//                throw new Exception(StringUtils.format("资源文件({})非法，不允许下载。 ", resource));
//            }
//            // 本地资源路径
//            String localPath = RuoYiConfig.getProfile();
//            // 数据库资源地址
//            String downloadPath = localPath + StringUtils.substringAfter(resource, Constants.RESOURCE_PREFIX);
//            String contentType;
//            if (downloadPath.endsWith(".xlsx")) {
//                contentType = "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet";
//            } else if (downloadPath.endsWith(".xls")) {
//                contentType = "application/vnd.ms-excel";
//            } else {
//                contentType = MediaType.APPLICATION_OCTET_STREAM_VALUE;
//            }
//            response.setContentType(contentType);
//            // 下载名称
//            String downloadName = StringUtils.substringAfterLast(downloadPath, "/");
////            response.setContentType(MediaType.APPLICATION_OCTET_STREAM_VALUE);
////            FileUtils.setAttachmentResponseHeader(response, downloadName);
//            response.setHeader("Content-Disposition", "attachment; filename=" + URLEncoder.encode(downloadName, "UTF-8"));
//            response.setContentType(MediaType.APPLICATION_OCTET_STREAM_VALUE);
//            FileUtils.writeBytes(downloadPath, response.getOutputStream());
//
//
//        } catch (Exception e) {
//            log.error("下载文件失败", e);
//        }
//    }


        try {
            if (!FileUtils.checkAllowDownload(resource)) {
                throw new Exception(StringUtils.format("资源文件({})非法，不允许下载。 ", resource));
            }

            // 本地资源路径
            String localPath = RuoYiConfig.getProfile();
            // 数据库资源地址
            String downloadPath = localPath + StringUtils.substringAfter(resource, Constants.RESOURCE_PREFIX);

            // 设置 Content-Type
            String contentType;
            if (downloadPath.endsWith(".xlsx")) {
                contentType = "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet";
            } else if (downloadPath.endsWith(".xls")) {
                contentType = "application/vnd.ms-excel";
            } else {
                contentType = MediaType.APPLICATION_OCTET_STREAM_VALUE;
            }
            response.setContentType(contentType);

            // 设置文件名和 Content-Disposition
            String downloadName = StringUtils.substringAfterLast(downloadPath, "/");
//            if (!downloadName.endsWith(".xlsx")) {
//                downloadName += ".xlsx"; // 如果文件名不以 .xlsx 结尾，则添加 .xlsx 后缀
//            }

            response.setHeader("Content-Disposition", "attachment; filename=" + URLEncoder.encode(downloadName, "UTF-8"));

            // 读取文件内容并写入响应输出流
            File file = new File(downloadPath);
            byte[] fileBytes = Files.readAllBytes(file.toPath());
            response.getOutputStream().write(fileBytes);
            response.getOutputStream().flush();
        } catch (Exception e) {
            log.error("下载文件失败", e);
        }
    }

}
